Climate change created unpredictability in rainfall, impacts crops


Via Pexels

Grace Smith | July 18, 2022

State Climatologist Justin Glisan said storms in Iowa are hitting smaller areas with more intensity and an increase in rainfall with unpredictable patterns. Iowa’s humidity levels have 13 percent more atmospheric moisture than 35 years ago, according to the Iowa Department of Natural Resources. As the climate warms, water vapor in the air will continue to increase, which creates an imbalance in soil moisture for crops.

Although there has been an increase in water vapor with the presence of climate change, July has been extremely dry, and trends show April and October as wetter months this year. This trend and the below-average rainfall during dry months create lessened crop production, which Iowa saw in May when spring planting conditions were not optimal. 

This year, unlike some past dry years, topsoil and subsoil are labeled “adequate” in moisture, to help crops continue to grow during dry months like July.

With the condition of the soil and projected trends, Glisan said the 2060s and 2070s are when precipitation severity catches up to climbing temperatures. So, innovations in agriculture technology and increased rainfall are aiding crops and increasing yields.

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